import org.codelibs.fess.crawler.exception.CrawlingAccessException;
import org.codelibs.fess.crawler.exception.MaxLengthExceededException;
import org.codelibs.fess.crawler.helper.ContentLengthHelper;
import org.codelibs.fess.crawler.helper.MimeTypeHelper;

import jakarta.annotation.Resource;

/**
 * FtpClient is a crawler client implementation for accessing resources via the FTP protocol.

 */
package org.codelibs.fess.crawler.filter;

import org.codelibs.fess.crawler.container.StandardCrawlerContainer;
import org.codelibs.fess.crawler.filter.impl.UrlFilterImpl;
import org.codelibs.fess.crawler.helper.MemoryDataHelper;
import org.codelibs.fess.crawler.service.impl.DataServiceImpl;
import org.codelibs.fess.crawler.service.impl.UrlFilterServiceImpl;
import org.dbflute.utflute.core.PlainTestCase;

/**

import org.codelibs.fess.crawler.exception.ChildUrlsException;
import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.codelibs.fess.crawler.exception.CrawlingAccessException;
import org.codelibs.fess.crawler.helper.impl.MimeTypeHelperImpl;
import org.dbflute.utflute.core.PlainTestCase;
import org.testcontainers.Testcontainers;
import org.testcontainers.containers.GenericContainer;

mvn clean install -pl fess-crawler

# Generate test coverage report
mvn jacoco:report
```

### Code Quality

```bash
# Format code
mvn formatter:format

# Update license headers
mvn license:format

# Run static analysis
mvn spotbugs:check
```

### Running Tests

```bash
# Run all tests
mvn test

# Run specific test class
mvn test -Dtest=CrawlerTest

            String description = getStatusDescription(status);
            assertNotNull(description);
            assertFalse(description.isEmpty());
        }
    }

    /**
     * Helper method to test switch statement
     */
    private String getStatusDescription(CrawlerStatus status) {
        switch (status) {
        case INITIALIZING:
            return "Crawler is initializing";

import org.codelibs.fess.crawler.exception.ChildUrlsException;
import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.codelibs.fess.crawler.exception.CrawlingAccessException;
import org.codelibs.fess.crawler.helper.impl.MimeTypeHelperImpl;
import org.dbflute.utflute.core.PlainTestCase;
import org.testcontainers.containers.GenericContainer;
import org.testcontainers.utility.MountableFile;

/**
 * @author shinsuke
 *
 */

        client.execute(action, request, listener);
    }

    @Override
    public Client filterWithHeader(final Map<String, String> headers) {
        client.filterWithHeader(headers);
        return this;
    }

    /**
     * Deletes documents matching the specified query using scroll and bulk delete.
     *
     * @param index The index to delete from.

import org.codelibs.fess.crawler.exception.ExtractException;
import org.codelibs.fess.crawler.extractor.Extractor;
import org.codelibs.fess.crawler.extractor.ExtractorFactory;
import org.codelibs.fess.crawler.helper.MimeTypeHelper;

/**
 * PdfExtractor extracts text content from PDF files using Apache PDFBox.
 * It supports password-protected PDFs and can extract embedded documents and annotations.
 *

import org.codelibs.fess.crawler.entity.ResponseData;
import org.codelibs.fess.crawler.exception.ChildUrlsException;
import org.codelibs.fess.crawler.exception.CrawlingAccessException;
import org.codelibs.fess.crawler.helper.impl.MimeTypeHelperImpl;
import org.dbflute.utflute.core.PlainTestCase;

/**
 * @author shinsuke
 *
 */
public class FtpClientTest extends PlainTestCase {
    private static final int FTP_PORT = 10021;

				"message/example",
				"message/external-body",
				"message/global",
				"message/global-delivery-status",
				"message/global-disposition-notification",
				"message/global-headers",
				"message/http",
				"message/imdn+xml",
				"message/news",
				"message/partial",
				"message/s-http",
				"message/sip",
				"message/sipfrag",
				"message/tracking-status",